hex.tree.drf

Class DRF

java.lang.Object

water.Iced

hex.ModelBuilder<M,P,O>

hex.tree.SharedTree<DRFModel,DRFModel.DRFParameters,DRFModel.DRFOutput>

hex.tree.drf.DRF

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable, java.lang.Cloneable, water.Freezable

public class DRF
extends SharedTree<DRFModel,DRFModel.DRFParameters,DRFModel.DRFOutput>

Gradient Boosted Trees Based on "Elements of Statistical Learning, Second Edition, page 387"

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class hex.tree.SharedTree

SharedTree.Driver, SharedTree.FrameMap

Nested classes/interfaces inherited from class hex.ModelBuilder

hex.ModelBuilder.BuilderVisibility, hex.ModelBuilder.FilterCols, hex.ModelBuilder.ValidationMessage

Field Summary

Fields inherited from class hex.tree.SharedTree

_calib, _initialPrediction, _model, _mtry, _mtry_per_tree, _ncols, _ntrees, _rand, DEV_DEBUG, MAX_NTREES

Fields inherited from class hex.ModelBuilder

_fold, _job, _messages, _nclass, _offset, _origDomains, _origNames, _parms, _priorClassDist, _removedCols, _response, _result, _train, _valid, _vresponse, _weights

Constructor Summary

Constructors

Constructor and Description
DRF(boolean startup_once)
DRF(DRFModel.DRFParameters parms)
DRF(DRFModel.DRFParameters parms, water.Job job)
DRF(DRFModel.DRFParameters parms, water.Key<DRFModel> key)

Method Summary

Methods

Modifier and Type	Method and Description
hex.ModelCategory[]	can_build()
void	init(boolean expensive) Initialize the ModelBuilder, validating all arguments and preparing the training frame.
protected double	score1(water.fvec.Chunk[] chks, double weight, double offset, double[] fs, int row)
boolean	scoreZeroTrees()
protected SharedTree.Driver	trainModelImpl() Start the DRF training Job on an F/J thread.

Methods inherited from class hex.tree.SharedTree

buildLayer, calib, checkMemoryFootPrint, chk_nids, chk_offset, chk_oobt, chk_resp, chk_tree, chk_weight, chk_work, computePriorClassDistribution, createModelSummaryTable, createScoringHistoryTable, cv_computeAndSetOptimalParameters, data_row, doScoringAndSaveModel, getInitialValue, getToEigenVec, haveMojo, havePojo, idx_nids, idx_offset, idx_oobt, idx_resp, idx_tree, idx_weight, idx_work, ignoreInvalidColumns, isSupervised, makeDecided, printGenerateTrees, shouldReorder, vec_nids, vec_offset, vec_oobt, vec_resp, vec_tree, vec_weight, vec_work

Methods inherited from class hex.ModelBuilder

algoName, algos, builderVisibility, checkDistributions, clearInitState, clearValidationErrors, computeCrossValidation, cv_AssignFold, cv_buildModels, cv_mainModelScores, cv_makeFramesAndBuilders, cv_makeWeights, cv_scoreCVModels, defaultKey, desiredChunks, dest, error_count, error, get, hasFoldCol, hasOffsetCol, hasWeightCol, hide, ignoreBadColumns, ignoreConstColumns, ignoreStringColumns, info, init_adaptFrameToTrain, isClassifier, isStopped, javaName, logMe, make, message, nclasses, nFoldCV, nFoldWork, nModelsInParallel, numSpecialCols, paramName, rebalance, response, schemaDirectory, separateFeatureVecs, setTrain, specialColNames, stop_requested, timeout, train, trainModel, trainModelNested, valid, validationErrors, vresponse, warn

Methods inherited from class water.Iced

asBytes, clone, copyOver, frozenType, read, readExternal, readJSON, reloadFromBytes, toJsonString, write, writeExternal, writeJSON

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DRF

public DRF(DRFModel.DRFParameters parms)

DRF

public DRF(DRFModel.DRFParameters parms,
   water.Key<DRFModel> key)

DRF

public DRF(DRFModel.DRFParameters parms,
   water.Job job)

DRF

public DRF(boolean startup_once)

Method Detail

can_build

public hex.ModelCategory[] can_build()

Specified by:

can_build in class hex.ModelBuilder<DRFModel,DRFModel.DRFParameters,DRFModel.DRFOutput>

trainModelImpl

protected SharedTree.Driver trainModelImpl()

Start the DRF training Job on an F/J thread.

Specified by:

trainModelImpl in class hex.ModelBuilder<DRFModel,DRFModel.DRFParameters,DRFModel.DRFOutput>

scoreZeroTrees

public boolean scoreZeroTrees()

Overrides:

scoreZeroTrees in class SharedTree<DRFModel,DRFModel.DRFParameters,DRFModel.DRFOutput>

init

public void init(boolean expensive)

Initialize the ModelBuilder, validating all arguments and preparing the training frame. This call is expected to be overridden in the subclasses and each subclass will start with "super.init();". This call is made by the front-end whenever the GUI is clicked, and needs to be fast; heavy-weight prep needs to wait for the trainModel() call.

Overrides:

init in class SharedTree<DRFModel,DRFModel.DRFParameters,DRFModel.DRFOutput>

score1

protected double score1(water.fvec.Chunk[] chks,
            double weight,
            double offset,
            double[] fs,
            int row)

Specified by:

score1 in class SharedTree<DRFModel,DRFModel.DRFParameters,DRFModel.DRFOutput>